Vitamin B-12 in Crohn's disease patients with small bowel surgery.
D002648:Child; D002675:Child, Preschool; D003424:Crohn Disease / Q000601:surgery*; D006801:Humans; D007082:Ileum / Q000601:surgery*; D007223:Infant; D007408:Intestinal Absorption; D011182:Postoperative Care / Q000379:methods; D014805:Vitamin B 12 / Q000627:therapeutic use*
D014805:Vitamin B 12